48 clues into the disappearance of my sister by Oates, Joyce Carol

When a beautiful woman mysteriously vanishes, her sister must tally up the clues to discover her fate. Marguerite has disappeared from her small town in Upstate New York. But was foul play involved? Did she merely get away for fun? Or did she finally make the decision to leave behind her claustrophobic life of limited opportunities? Her younger sister Gigi wonders if the flimsy silk Dior dress, so casually abandoned on the floor, is a clue to Marguerite’s having seemingly vanished. The police examine the footprints made by her Ferragamo boots leaving the house, ending abruptly, and puzzle over how that can help lead to her. Gigi, not so pretty as her sister, slowly reveals her hatred for the perfect, much-loved, Marguerite. Bit by bit, like ripping the petals off a flower blossom, revelations about both women are uncovered.